Red Pulse Apocalypse

Are aliens real? For the people Earth, the attack was devastating. A red pulse from the alien's floating world destroyed all communication and electronics. Across the globe, people lost the ability to reach loved ones. Governments and militaries were cut off like a light switch. Now, with the world in chaos, ordinary people will have to survive on their wits alone; because the aliens are not finished with us.
Isolated and without resources, survivors are becoming prey to terrifying creatures without mercy. Will the human race find a way to survive the attacks with no technology to save us? Can a few brave souls band together and save the human race from extermination?